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GRE幅值较SE小,图像信噪比高 GRE幅值较SE小,图像信噪比低 GRE幅值较SE大,图像信噪比高 GRE幅值较SE大,图像信噪比低 GRE幅值较SE小,图像信噪比相同
takes to caters to attends to appeals to
easy easier easiest the easiest
occur happen strike belong
sticks to contributes to attends to appeals to
to spend spend spending spent
GRE序列是用90°射频脉冲所激发的 GRE序列有较长TR时间 GRE序列使用180°聚焦脉冲 GRE序列回波强度按T*2衰减 GRE序列对磁场的稳定性和梯度切换要求不高
occur happen strike belong
GRE幅值较SE小,图像信噪比高 GRE幅值较SE小,图像信噪比低 GRE幅值较SE大,图像信噪比高 GRE幅值较SE大,图像信噪比低 GRE幅值较SE小,图像信噪比相同
0.084μgRE 0.167μgRE 0.363μgRE 0.631μgRE 1.000μgRE
in general on purpose in particular in all
GRE序列是用90°射频脉冲所激发的 GRE序列有较长TR时间 GRE序列使用180°聚焦脉冲 GRE序列使部分纵向磁化转变为横向磁化 GRE序列对磁场的稳定性和梯度切换要求不高
the importance of applying for a passport and visa safety regulations for visiting other countries the limitations to traveling around the world the requirements for their traveling abroad